Datasheet

4
ENS160 Datasheet v0.95 preliminary / December 2020
1 Block Diagram
The ENS160 digital multi-gas sensor consists of four independent heaters and gas sensor
elements, based on metal oxide (MOX) technology and a controller as shown in the functional
block diagram below.
Figure 1: Functional Blocks
The Heater Driver controls the sensor operating modes and provides power to the heaters
of each individual sensor element. During operation the heater driver regulates the heaters
to their individual set-points.
The Sensor Measurement block determines the value of the sensor resistance for each
individual sensor element.
The System Control block processes the resistance values internally to output calculated
TVOC, CO
2
-equivalents, AQIs and further signals on the digital interface.
The ENS160 includes a standard 2-wire digital I
2
C interface (SCL, SDA) or 4-wire digital SPI
interface (SCLK, MOSI, MISO, CSn) for communication to the main host processor.
On-chip memory is used to store calibration values.
SDA (MOSI)
ADDR (MISO)
ENS160
Controller
Heater Driver
x 4
Sensor Measurement
x 4
System Control
Memory
Data Processing
I
2
C
(SPI)
4 Independent Sensors
V
DD
GND
SCL (SCLK)
V
DDIO
CSn
INTn
Heaters Sensors